Type 4000
6
Figure 8. Front Cover and Indicator Cover
FRONT COVER
INDICATOR
COVER O-RING
IDENTIFICATION
COVER
INDICATOR
COVER
FRONT
COVER
O-RING
NOTCH
FRONT COVER SHOWN WITH O-RING LOOPED
OVER NOTCHES TO PERMIT DRAINING
A7196 / IL
Instrument Connection
Connect the control device 3 to 15 psig (0.2 to 1.0 bar)
output to port I on the adapter housing. If a gauge to
monitor the input signal is desired, remove the plug
from gauge port I
p
and install an appropriate pressure
gauge.
Output Gauge
If an output gauge is desired, remove the plug from
gauge port C and install an appropriate pressure
gauge.
Vent
WARNING
If a flammable, toxic, or reactive gas is
to be used as the supply pressure me-
dium, personal injury or property dam-
age could result from fire or explosion
of accumulated gas or from contact with
toxic, or reactive gas. The positioner/ac-
tuator assembly does not form a gas-
tight seal, and when the assembly is in
an enclosed area, adequate ventilation
and necessary safety measures should
be used.
There is no pipe fitting for remote venting. The posi-
tioner exhaust is under the actuator cover.
Operating Information
Front Cover and Indicator Cover
The positioner front cover is shown in figure 8. It is
secured to the unit with four captive screws and
sealed with an O-ring. The front cover O-ring can be
looped over notches in the front cover to allow for
drainage. There are eight locations on the front cover
where the O-ring can be looped. This unique sealing
system allows for complete sealing or draining of the
units by changing the position of the front cover O-
ring.
The indicator cover is O-ring sealed and secured by a
bayonet coupling. The indicator cover also secures the
identification cover to the front cover.
To remove the indicator cover, turn it slightly counter-
clockwise until it loosens. The identification cover and
indicator cover O-ring are now removable. When
installing the indicator cover and identification cover,
make sure that the indicator cover O-ring is properly
engaged.
Two identification covers are available: one for actua-
tor travels of 3/4-inch (19.1 mm) or less, and one for
